C++[BF/NF] remove automatic derivation of proposal from priors
C++[BF/NF] remove automatic derivation of proposal from priors

esc/Psignifit-3.x,esc/Psignifit-3.x,esc/Psignifit-3.x,esc/Psignifit-3.x,esc/Psignifit-3.x,esc/Psignifit-3.x